Solvent Dependency in Stereoselective δ‐Lactam Formation of Chiral α‐Fluoromalonate Derivatives: Stereodivergent Synthesis of Heterocycles with Fluorine Containing Stereocenters Adjacent to Tertiary Stereocenters
作者:Kaiheng Zhang、Xiang Sheng、Luca Deiana、Erik Svensson Grape、A. Ken Inge、Fahmi Himo、Armando Córdova
DOI:10.1002/adsc.202101404
日期:2022.3
The discovery and investigation of solvent dependency in stereoselective intramolecular amidation of chiral 5-aminofunctionalized-2-fluoromalonate ester derivatives, which gives access to highly functionalized δ-lactams with a quaternary fluorine-containing stereocenter, is disclosed. Experimental work together with density functional theory calculations led to understanding of how to direct and switch
公开了手性 5-氨基官能化-2-氟代丙二酸酯衍生物的立体选择性分子内酰胺化中溶剂依赖性的发现和研究,这使得获得具有季含氟立体中心的高度官能化 δ-内酰胺。实验工作与密度泛函理论计算一起导致了对如何指导和转换立体选择性 δ-内酰胺形成的立体化学结果的理解。这种依赖溶剂的立体选择性开关与不对称催化和级联反应的结合为立体发散合成所有可能的含氟立体异构体的立体异构体提供了前所未有的策略,这些立体异构体与各种杂环化合物的叔立体中心相邻,95->99% ee在一锅里。